This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
ShockleyQueisserFullCurve.svg en The ShockleyQueisser limit for the maximum possible efficiency of solar cell The xaxis is the bandgap of the solar cell the yaxis is the highest possible efficiency ratio of electrical power output to light power input Assumes singlejunction solar cell under unconcentrated light and some other assumptions